×

Metal working apparatus and methods of piercing

  • US 3,962,897 A
  • Filed: 05/11/1970
  • Issued: 06/15/1976
  • Est. Priority Date: 10/05/1965
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of piercing metal members, particularly members containing slag inclusions comprising the steps of urging said member at a temperature above about 1750°

  • F over an as formed cast piercer point by rolling whereby said point passes through and forms an axial opening in the ingot, said point being formed of an alloy consisting essentially of about 0.015% to 2% carbon, about 5% to 65% cobalt, about 15% to 35% chromium and about up to 30% iron.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×